July weather forecast
Sisters, OR

Weather in July

July in Sisters, Oregon, is a moderately hot summer month, with temperature in the range of an average high of 78.8°F (26°C) and an average low of 49.6°F (9.8°C).

Temperature

With an average high-temperature of 78.8°F (26°C) and an average low-temperature of 49.6°F (9.8°C), July is the warmest month.

Humidity

The months with the lowest humidity in Sisters are July and August, with an average relative humidity of 53%.

Rainfall

July is the month with the least rainfall in Sisters. Rain falls for 5 days and accumulates 0.35" (9mm) of precipitation.

Snowfall

June through August are months without snowfall.

Daylight

In July, the average length of the day is 15h and 7min.
On the first day of July in Sisters, sunrise is at 5:26 am and sunset at 8:53 pm. On the last day of the month, sunrise is at 5:52 am and sunset at 8:32 pm PDT.

Sunshine

July has the most sunshine of the year in Sisters, with an average of 12h of sunshine.

UV index

The month with the highest UV index is July, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 in July interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the warmest month in Sisters?

With an average high-temperature of 78.8°F (26°C) and an average low-temperature of 49.6°F (9.8°C), July is the warmest month.

What is the least humid month in Sisters?

The months with the lowest humidity in Sisters, Oregon, are July and August, with an average relative humidity of 53%.

What is the average humidity in July in Sisters?

The average relative humidity in July in Sisters is 53%.

What is the driest month in Sisters?

July is the month with the least rainfall. Rain falls for 5 days and accumulates 0.35" (9mm) of precipitation.

How much does it rain in Sisters in July?

In July, in Sisters, the rain falls for 5 days. Throughout July, 0.35" (9mm) of precipitation is accumulated.

When it does not snow in Sisters?

In Sisters, Oregon, snow does not fall in June through August.

How many hours of daylight does Sisters have in July?

In July, the average day length in Sisters is 15h and 7min.

When are sunrise and sunset in July in Sisters?

In July, on the first day of the month, sunrise is at 5:26 am and sunset at 8:53 pm. On the last day of the month, in Sisters, Oregon, sunrise is at 5:52 am and sunset at 8:32 pm PDT.

What month has the most sunshine in Sisters?

July has the most sunshine of the year in Sisters, Oregon, with an average of 12h of sunshine.

How many hours of sunshine does Sisters have in July?

In July, the average sunshine duration in Sisters, Oregon, is 12h.

When is the highest UV index in Sisters?

With an average maximum UV index of 6, July is the month with the highest UV index in Sisters.

What is the UV index reading in July in Sisters?

In Sisters, Oregon, the average daily maximum UV index in July is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Sisters, OR

Average temperature in July - Sisters, OR
  • Average high temperature in July: 78.8°F

The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is December (36.5°F).

  • Average low temperature in July: 49.6°F

The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is December (24.8°F).

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Average pressure in July
Sisters, OR

Average pressure in July - Sisters, OR
  • Average pressure in July: 30"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).

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Average wind speed in July
Sisters, OR

Average wind speed in July - Sisters, OR
  • Average wind speed in July: 4.9mph

The windiest month (with the highest average wind speed) is February (6.1mph).
The calmest months (with the lowest average wind speed) are August and September (4.8mph).

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Average humidity in July
Sisters, OR

Average humidity in July - Sisters, OR
  • Average humidity in July: 53%

The month with the highest relative humidity is December (84%).
The months with the lowest relative humidity are July and August (53%).

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Average rainfall in July
Sisters, OR

Average rainfall in July - Sisters, OR
  • Average rainfall in July: 0.35"

The wettest month (with the highest rainfall) is January (3.31").
The driest month (with the least rainfall) is July (0.35").

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Average rainfall days in July
Sisters, OR

Average rainfall days in July - Sisters, OR
  • Average rainfall days in July: 5 days

The month with the highest number of rainy days is March (16.9 days).
The month with the least rainy days is July (5 days).

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Average snowfall in July
Sisters, OR

Average snowfall in July - Sisters, OR
  • Average snowfall in July: 0"

The month with the highest snowfall is February (13.74").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in July
Sisters, OR

Average snowfall days in July - Sisters, OR
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is December (14.7 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in July /
Average sunshine in July
Sisters, OR

Average daylight in July / Average sunshine in July - Sisters, OR
  • Average daylight in July: 15h and 7min

The month with the longest days is June (Average daylight: 15h and 28min).
The month with the shortest days is December (Average daylight: 8h and 55min).

  • Average sunshine in July: 12h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

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Average sunshine days in July
Sisters, OR

Average sunshine days in July - Sisters, OR
  • Average sunshine days in July: 23.3 days

The month with the most sunshine days is July (23.3 days).
The month with the least sunshine days is March (8.1 days).

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Average UV index in July
Sisters, OR

Average UV index in July - Sisters, OR
  • Average UV index in July: 6

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in July
Sisters, OR

Average cloud cover in July - Sisters, OR
  • Average cloud cover in July: 11

The months with the most cloud cover are January, February, March and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 11).

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Average visibility in July
Sisters, OR

Average visibility in July - Sisters, OR
  • Average visibility in July: 6mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).

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